Bug 403174 - Attach sheets under the toolbar, not directly under the titlebar. r=josh

--HG--
extra : rebase_source : a4bdfa97c723fa2e6191719842a85f64db9a81cc

widget/src/cocoa/nsCocoaWindow.mm

@@ -1865,6 +1865,11 @@ static const NSString* kStateInactiveTitlebarColorKey = @"inactiveTitlebarColor"
     // we respond to it just in case.
     if ([self respondsToSelector:@selector(setBottomCornerRounded:)])
       [self setBottomCornerRounded:NO];
+
+#ifdef NS_LEOPARD_AND_LATER
+    [self setAutorecalculatesContentBorderThickness:NO forEdge:NSMaxYEdge];
+    [self setContentBorderThickness:0.0f forEdge:NSMaxYEdge];
+#endif
   }
   return self;
 
@@ -1909,6 +1914,10 @@ static const NSString* kStateInactiveTitlebarColorKey = @"inactiveTitlebarColor"
     return;
   mUnifiedToolbarHeight = aToolbarHeight;
 
+#ifdef NS_LEOPARD_AND_LATER
+  [self setContentBorderThickness:aToolbarHeight forEdge:NSMaxYEdge];
+#endif
+
   // Since this function is only called inside painting, the repaint needs to
   // be synchronous.
   [self setTitlebarNeedsDisplayInRect:[self titlebarRect] sync:YES];